Total no of Pillar required for 1000 Sq ft build up:Approx Cost for one pillar for G+1:Cost for cement concrete roof per sq Ft:Cost for house in 1st Floor per sq ft:Cost for Parking Area (Just Normal Tiles) per sq ft:

For building, in my view take structure design.
The size and
numbers of columns, MS Steel bars are calculated with the structural
drawing
according to loading condition, safe bearing capacity of soil and effect
of earth quack etc. and design can
save construction cost as without design one use more quantity in fear. .
See some links for construction